teachers k 12

The half-life of 92 U 238 against alpha decay is 4.5 x 109 years. How many disintegrations per second occur in 1 g of 92 U 238 ? Suggested solution: Again, since one k mole of any isotope contains Avogadro's number of atoms, there fore 1 g of 92 U 238 contains Half ..

Calculation Of Dissociation Constant K - Degree of dissociation ( a ) at a particular concentration c is related to the dissociation constant (K..

Students of grade 5 went for a picnic with their teachers to an amusement park. Entry fee per student is $20 and per teacher is $30. There were 12 teachers altogether. The total entry fee paid was $420. Select the correct verbal model so as to find the total ..

The school ordered some chocolates to distribute among the students. The teachers packed the chocolates in groups of 6. Which list shows the numbers in groups of 6? => 6, 12, 20, 28 or 6, 12, 16, 20 or 12, 16, 22, 28 or 18, 24, 30, 36..

The stem and leaf plot represents the salaries (in thousands) of full-time teachers in a school. Find the range of the data. => $12,000 or $15,000 or $14,000 or $20,000..

There are 30 students in a class out of which 10 are girls and 20 are boys. Express the probability of choosing a girl from 30 students verbally, if the teacher chooses a student at random. => 10 out of 30 or 20 out of 30 or 12 out of 30 or 30 out of 30..

Equilibrium Constant (K c ) From Nernst Equation - In the following cell, Zn (s)| ZnSO 4 (aq) || CuSO 4 (aq) |Cu(s) Electrons flow from the Zn to the Cu rod. 1) Zn from the Zn rod dissolves as Zn 2 + 2) Cu 2 + from CuSO 4 deposits on the Cu plate. The concentration of CuSO 4 decreases whi..

Which point does K represent on the number line? => 12 or 14 or 10 or 8..

Evaluate the expression k - 4 for k = 12 . => 8 or 7 or 9 or 6..